北京大学学报(医学版) ›› 2021, Vol. 53 ›› Issue (2): 364-370. doi: 10.19723/j.issn.1671-167X.2021.02.022
WANG Si-wen,YOU Peng-yue,LIU Yu-hua(),WANG Xin-zhi,TANG Lin,WANG Mei
摘要:
目的: 建立犬拔牙窝模型,采用影像学分析方法评价拔牙窝内植入去蛋白牛骨基质骨粉颗粒Bio-Oss®(简称Bio-Oss骨粉)并覆盖复层猪小肠黏膜下层膜(multilaminated small intestinal submucosa membrane, mSIS)或可吸收胶原膜Bio-Gide® (简称Bio-Gide膜), 愈合4周和12周后的牙槽窝内成骨效果。方法: 拔除3只比格犬双侧上下颌共计18颗前磨牙的远中根,得到18个拔牙窝,随机平均分为3大组,并分别对各拔牙窝组进行以下操作:(1)植入Bio-Oss骨粉并覆盖mSIS膜(mSIS组),(2)植入Bio-Oss骨粉并覆盖Bio-Gide膜(BG组),(3)自然愈合(空白对照组)。每大组各随机平均分为2个小组,分别于手术后4周和12周取样进行微计算机体层扫描(micro-computed tomograph, Micro-CT), 检测评价各组牙槽窝内新骨的生长情况,比较mSIS膜和Bio-Gide膜对拔牙窝内骨再生的影响。结果: Micro-CT分析显示,mSIS组和BG组在术后4周和12周的新生骨容积比均显著高于空白对照组(P<0.05),其中mSIS组略高于BG组,但两组间差异无统计学意义(P>0.05)。术后4周mSIS组和BG组的牙槽窝冠1/3区域新生骨容积比例显著高于中1/3及根1/3区域(P<0.05)。术后4周各组的新生骨密度值相近(P>0.05),术后12周时mSIS组和BG组的新生骨密度值均显著高于对照组(P<0.05)。术后4周和12周mSIS组和BG组的新生骨小梁的数量以及排列紧凑程度明显优于空白对照组(P<0.05),而mSIS略优于BG组,但两组间差异无统计学意义(P>0.05)。各组间骨小梁厚度的差异无统计学意义(P>0.05)。结论: 两种屏障膜联合去蛋白牛骨基质植入拔牙窝内有利于新骨再生,mSIS膜与Bio-Gide膜的应用效果相似。
中图分类号:
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